Sorry. I need to add - I am referring about 1980s.
It doesn't matter to when you are refering to.
Yes people go threw struggles and termoil. But you are gatekeeping. And telling people who are struggling to shut up and smile because someone else is struggling too, doesn't negate the personal struggle they are going threw themselves.
It is beyond just choosing to be happy or not. For many it becomes a complete chemical imbalance in the brain that causes the emotions to be where they are rather than thinking of it as a situational life thing, for most it is a chemical thing in the brain that you can't just will away.
Good for you you got over it. But it also seems you have the most toxic view as to how, and your expieriences seem to have robbed you of any ability to have empathy for others. Seems to me you aren't over it. You just shut it away to use it as a weapon to attack others. (Lack of empathy is just as much a result of what you say you went threw as someone struggling to come to terms with it.)